Vestelli’s test-winning and Key Flag products

We provide complete wastewater systems for both cottages and homes. Our products are environmentally friendly and have passed the strictest tests.
Greywater Treatment for Cottages


Separate drainage Extra low IISI 3000 Closed tank + IISI H4 Grey water filter
Separate sewage is a good method for treating all domestic wastewater in a property, both in a detached house and a holiday home. Toilet water is directed to a closed tank and…

Sauna-Seppo — Carrier water filter for cleaning small amounts of water (saunas and cottages)
The Sauna-Seppo grey water purifier is a reliable, completely electricity-free cleaning solution for treating grey wastewater in leisure properties. The device is particularly…

Pisara — Greywater filter for cleaning washing water for 1–5 people in holiday homes
The Pisara grey water filter for cottage washing water is a compact, biological microbial solution for cleaning grey wastewater from a holiday home. Designed and manufactured in…

Greywater filter IISI COTTAGE WELL
The IISI COTTAGE WELL greywater filter for cottages is an effective and easy-to-use solution for cleaning the sauna and kitchen wash water in a cottage.
Greywater Treatment for Homes and Holiday Properties
Greywater treatment system for all greywater from a holiday property or home.


Greywater treatment plant IISI H12
The IISI H12 greywater treatment plant cleans the washing water of 1-12 people efficiently and affordably in both detached houses and leisure properties.

Separate drainage Extra low IISI 5000 Closed tank + IISI H6 Greywater treatment plant
Separate sewage is a good method for treating all domestic wastewater in a property, both in a detached house and a holiday home. Toilet water is directed to a closed tank and…

Separate drainage Extra low IISI 6100 Closed tank + IISI H12 Greywater treatment plant
Separate sewage is a good method for treating all domestic wastewater in a property, both in a detached house and a holiday home. Toilet water is directed to a closed tank and…

Vestelli Biopurifier 3 – greywater purifier for home and cottage
Vestelli Bio Purifier 3 is a biological and chemical-free greywater purifier for homes and cottages. It effectively purifies washing, showering and dishwashing water without filter…
Holding Tanks for Blackwater


Closed tank extra low IISI 6100
The height from the bottom of the tank to the drain outlet is only 100 cm. You can also order this tank with a connection height of 78 cm, which gives a volume of 5000L.

Closed container IISI DONITSI 5000 L
The closed tank IISI DONITSI 5000 L is well suited for toilet water in detached houses and holiday homes in connection with separate sewage. The compact dimensions together with…

Closed tank extra low IISI 3000
The height from the bottom of the tank to the drain outlet is only 77 cm. Extra-low IISI – Closed tank for wastewater collection. The extra-low structure makes installation…

Closed tank extra low IISI 12200
The height from the bottom of the tank to the drain outlet is only 100 cm. You can also order this tank with a connection height of 78 cm, which means that the volume of one tank…
Small-Scale Treatment Plants for Blackwater and Greywater


Batch treatment plant AVALON 5
The AVALON 5 batch wastewater treatment plant treats all domestic wastewater for 1-5 people (max. 750 l/day). AVALON batch treatment plants effectively treat all household…

Batch treatment plant AVALON 10
The AVALON 10 batch treatment plant cleans all domestic wastewater for 3-10 people (max. 1500 l/day). AVALON batch treatment plants effectively treat all household wastewater.

Batch treatment plant AVALON 25
The AVALON 25 batch treatment plant treats all domestic wastewater for 10-25 people (max. 4000 l/day). AVALON batch treatment plants effectively treat all household wastewater.

Batch treatment plant AVALON 20
The AVALON 20 batch wastewater treatment plant treats all domestic wastewater for 10-20 people (max. 3000 l/day). AVALON batch treatment plants effectively treat all household…
Field Solutions for Blackwater and Greywater


Soil Treatment
Soil treatment packages are designed for environmentally friendly treatment of toilet, washing, and household water. The systems are sized for wastewater treatment needs of 1–10 people.

AVALON BIO 5 Soil filter plant with cartridges
The AVALON BIO 5 soil filter with cartridges purifies all domestic wastewater for 1-5 people (max. 750 l/day). The total length of the installed cassette field is 7.2 meters.

AVALON BIO 10 Soil filter plant with cartridges
The AVALON BIO 10 soil filter plant with cartridges purifies all domestic wastewater for 1-10 people (max. 1500 l/day). The total length of the installed cassette field is 7.2…

Manifold package
The collector pipe package complements Vestelli's absorption pipe packages for a soil filtration plant. In soil filtration, wastewater is filtered using a soil filtration field.
Large Treatment Plants for Accommodation, Residential Areas, and Industry


Larger Vestelli Biopurifiers
Greywater treatment system for all greywater from a large property. Sized according to the property.

Larger Vestelli Treatment Plants
All-wastewater treatment system for all wastewater from a large property. Sized according to the property.

Vestelli Treatment Plants – for all wastewater
Modern Finnish treatment plants based on the efficient IFAS-MBBR process. They are designed for Finland's cold climate and also cope well with long periods of non-use and varying…

BioStone-ChemStone Large purifiers
BSCS or BIOSTONE-CHEMSTONE treatment plants effectively treat all residential wastewater in locations where high capacity is required. Well suited for residential buildings…
Why Vestelli?

We provide complete wastewater solutions for both cottages and homes. Our products are environmentally friendly and have passed the strictest tests.
The Biopurifier product range is designed for greywater. Biopurifiers are available for everything from a single-person cottage to systems for several hundred people. They are the most tested products on the market, have won an independent user survey and achieve the highest treatment levels.
Vestelli’s holding tanks are high-quality, durable tanks. Their capacity is optimised for the most common sewage tanker size. Thanks to their carefully designed structure, the tanks are extremely strong.
The BioKube product range is suitable for all wastewater. BioKube products are manufactured from single-person home use to village systems for several hundred people. BioKube products are the only small-scale treatment plants for all wastewater to have passed the 6-month shutdown test.
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A Professionally Prepared Wastewater Plan Pays Off

A wastewater plan ensures that your property’s water is treated correctly in compliance with regulatory requirements and that it does not end up polluting nature or waterways.


Proper wastewater planning ensures the functionality, safety, and environmental friendliness of your property’s wastewater treatment for decades to come.

A wastewater plan typically pays for itself during the installation phase. A legally compliant wastewater system also increases your property’s value when selling.
Interested in a properly sized and cost-effective wastewater system?
Contact us today!